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- W2014782570 abstract "Die relativen und absoluten Konfigurationen der beiden diastereomeren Terphenylderivate 3A und 3B sowie aller drei Quaterphenylderivate 4C-4E des Orcins (1) werden bestimmt, indem chirales 2 mit 1 zu 3A und mit weiterem 2 zu 4C und 4E sowie chirales 3 mit 1 zu 4C und 4D oxidativ verknüpft werden. Die Drehwerte der chromatographisch getrennten Enantiomeren 4C-4E gestatten keine Zuordnung und deuten auf einen hohen negativen Beitrag zur optischen Drehung bei zentraler (R)-Konfiguration oder molekularer M-Helicität. The Absolute Configuration and Optical Rotation of Ter- and Quaterphenyl Derivatives of Orcinol The relative and absolute configurations of the two diastereoisomeric terphenyl derivatives 3A and 3B and of all three quaterphenyl derivatives 4C-4E obtained from orcinol (1) by oxidative coupling, have been determined. Thus coupling of chiral 2 with 1 or with 2 affords 3A or 4C and 4E, respectively, while coupling of chiral 3 with 1 yields 4C and 4D. The optical rotations of the enantiomers 4C-4E, resolved by chromatography, do not allow any configurational assignments to be made, but indicate large negative contributions from the central (R)-configuration or the molecular M-helicity." @default.
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- W2014782570 date "1979-03-26" @default.
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- W2014782570 title "Über die absolute Konfiguration und optische Drehung von Ter- und Quaterphenylderivaten des Orcins" @default.
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- W2014782570 doi "https://doi.org/10.1002/jlac.197919790315" @default.
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